Multicast is the mechanism using which data traffic is reduced thoughout the network if a certain number of receivers are interested in the same data from the same source. This increases the efficiency of the network as less packets needs to be processed by the intermediate routers in the network. ...

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How to multicast live H264 without transcoding?

I have a live H264 stream (hardware encoded from the webcam) and I'd like to stream it over the network using multicast on a Linux platform. Because the platform has limited CPU power, and the data ...
3
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2answers
248 views

How do I disable multicast on the TCP/IP stack for Windows?

I'd like to disable the TCP/IP stack's support for multicast completely on Windows for diagnostic purposes. How do I do this? I'm looking to do this on Windows XP, but if none can be provided, ...
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1answer
255 views

Windows XP multicast route unable to be set on Windows 7

I have to set a route that I am setting in windows xp by using this command : route -p add 224.224.224.0 mask 240.240.240.0 150.1.2.194 metric 30 Under windows 7, this command doesn't work anymore ...
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1answer
37 views

How can my server announce its presence to everyone in the network [closed]

The situation is as follows. I want to have an application running on a server. All of the desktops in the company has to connect to it. But I do not want the IP address of the server to be hard coded ...
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115 views

NTP Multicast configuration

I'm trying to get NTP multicast set up between a few computers. Right now I'm getting NTP multicast packets from a computer that I have neither access to nor information on (let's call that A) that is ...
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246 views

Command to add multicast address to routing table

I am trying to add a multicast route. If I do a netstat -g I get: idf@idf-ZBOX-ID42-BE ~ $ netstat -g IPv6/IPv4 Group Memberships Interface RefCnt Group --------------- ------ ...
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1answer
29 views

Can multicast send different information to different listeners? [closed]

How secure is multi-cast? Is it possible to send different information to different listeners without them knowing it? What if you got into the level of building your own custom hardware to do this? ...
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493 views

Why does multicast streaming only work with 224.0.0.0/4 routed to network card/NIC in Linux?

a project of mine involves multicast streaming of DBV-S2 TV channels by using a networked SAT tuner. As there are no IGMP-capable network switches, the network is quite stressed and so I set up a ...
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1answer
61 views

What hosts does multicast DNS send to?

mDNS (multicast DNS) queries are sent to 224.0.0.251:5353. While this is a multicast address, don't all hosts on the network segment have to receive this traffic in order to have the correct DNS ...
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1answer
64 views

Take TCP stream and rebroadcast to UDP multicast?

How can I, in Windows and/or Linux, take data from a TCP stream and rebroadcast it on UDP to a specified multicast group? The stream data will need to be chopped into chunks of 500 bytes or less. ...
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1answer
2k views

WiFi UDP unicast vs. multicast speed

From what I have gathered UDP multicast / broadcast over WiFi will not yield the speed as one would have thought. What about UDP unicast over WiFi? Can anyone confirm that the latter will have a ...
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90 views

How does UPnP know which IGD to port forward on if there is more than one IGD?

Say I have two IGDs on the same subnet with UPnP enabled. The host is configured to use one as its default gateway. How do UPnP applications know which IGD to port forward on. I don't think they use ...
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61 views

How to determine mcast_if of process listening on UDP multicast address?

How to determine mcast_if of process listening on UDP multicast address? I know I can netstat -lnp to show what processes are listening on which addresses, but a process may have a mcast_if ethX. ...
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1answer
2k views

VLC internet multicast

I want to stream video using VLC so everyone can connect to my pc and watch it. Is there any way to do it? As I understand I can multicast video only in my network (but I need it to be available from ...
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1answer
63 views

What will a router do receiving a multicast IP packet with no multicast routing protocols enabled in it?

Have anybody seen what a router having no multicast routing protocols enabled will do when it receives multicast data ? will it ignore ? Will it consider it as like any other unicast data ?
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2answers
3k views

DD-WRT and Chromecast: default WLAN to LAN bridge blocks UDP?

I have DD-WRT running in gateway mode on a DIR-615 I1. I've updated to the newest available build. Chromecast is a wireless-only device, for those unfamiliar. The device has been set up and ...
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1answer
635 views

Windows 8 laptop doesn't receive IGMP multicast packets

I am trying to use multicast to discover services like Bonjour printers etc. These all work via Windows XP wired and wireless and Windows 7 wired and wireless. The Windows 8 laptop (Dell XPS 12) ...
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0answers
186 views

Swapping the ISP supplied router on DSL connections that also supply TV

My ISP is TalkTalk and I have one of their FTTC packages. With that I also have their YouView TV service. Before getting this service I used my own routers, as ISP supplied ones didn't have the ...
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1answer
993 views

Limit UDP outbound traffic to loopback (localhost) instead of eth0

Atm i'm testing it on Ubuntu Server at VMware Workstation + Windows 7 local host with bridged connection. Later this has to go to live server. I have VLC streaming video file on Ubuntu with cvlc ...
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1answer
305 views

Multicast LAN ping twice as slow than unicast?

I've done a simple test on my little home LAN. I have enabled broadcast ICMP echo responses with sysctl net.ipv4.icmp_echo_ignore_broadcasts=0 on just a single host and then pinged a multicast ...
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1answer
687 views

Record multicast stream on multi-homed Linux host

I have what sounds like the simplest possible use case, and yet nothing is satisfactory. I have a multi-homed host and I would like to listen to multicasts on eth1, and shove all the payload (NOT ...
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3answers
1k views

IP camera to multiple users. Bandwidth concerns?

I'm trying to set up an outdoor ip camera. I'd like to embed this camera on a website and allow anyone to view the stream. There are several solutions that I can think of. Unicast the stream and ...
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1answer
536 views

Filter multicast from WAN to specified vlan

I'm using ebtables to filter multicast IPTV from my Wireless and Wired Lan. Right now its configured like this: Router ( DD WRT ) VLAN1 (PC Network) VLAN2 (IPTV) I am using this command: insmod ...
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1answer
400 views

IGMP v3 multicasted television through router with IGMP v2

we can connect to internet using LAN cable at out student's dormatory. We can watch multicasted television on our computers using VLC media player. Everything works fine this way. I decided to buy ...
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2answers
523 views

Flash BIOS on multiple computers over the network?

This might be a ridiculous question but is there a way to Upgrade the bios of multiple machines via the network? We have multiple Lenovo machines that require BIOS updates that we are doing ...
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1answer
739 views

Multicast streaming without IGMP

If server is streaming to multicast address (for example 224.1.1.1:1234) and a client is receiving data from the same address: in this case, is IGMP protocol used automatically? Is it possible to use ...
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1answer
766 views

Multicast traffic generator for Windows

Are there any multicast traffic generators for Windows?
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1answer
6k views

How do I check if my router blocks multicast traffic?

I am trying a sender and receiver multicast c# program on my computer. How do I check if my router blocks multicasting? i.e whether members of the group receive packets from 224.0.0.1.
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2answers
5k views

How can I test if my Windows XP machine can send multicast packets?

I would like to know how test if my Windows XP machine has the ability to multicast. Therefore, I want to multicast a packet from my machine to itself. How can I do that?
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2answers
93 views

IPv6 SSM multicast: is it built in or do you have to use another protocol like PIM-SM with it?

I'm trying to understand how integrated SSM multicast is to IPv6. Is it built in and sent solely by ICMPv6 messages or do you have to run something extra like PIM-SM? The reason I as is I've seen ...
0
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3answers
254 views

How far does a multicast message go?

I'm wondering how far a multicast message sent from a server can go. What stops it from going to all computers in the world?
2
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1answer
6k views

Linux built-in or open source program to join multicast group?

I'm using tcpdump to capture multicast packets and had to code up a custom program to join multicast feeds so tcpdump will "see" the packets. Just wondering if netcat or any other applications can ...
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1answer
69 views

can Multicast receivers also act as multicast data generators?

suppose I have 4 computers A B C and D. If B C and D are receiving multicast data from A, can one of them ...say B... can also send multicast data to others say A C and D?
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2answers
18k views

How To Set Multicast Rate On Apple AirPort Extreme

I have an Apple AirPort Extreme Rev C (2011) and I need to set a manual multicast rate. While I can set a manual multicast rate, I only have the option between low, medium and high. In the previous ...
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1answer
930 views

Problem in listening to multicast in multihomed Linux server

I am trying to write a multicast client on a machine with two NICs, and I can't make it work. I can see with a sniffer that once I start the program the NIC (eth4) start receiving the multicast ...
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1answer
1k views

Problems Receiving a Multicast stream - How to Debug?

Through my university I've got a multicast stream that I can watch (using VPN). I try to watch it using vlc, vlc udp://@233.121.29.1:1234 but nothing happens. When I try to double click to start it ...
2
votes
2answers
496 views

Weird connectivity issue wtih USB Wifi stick

I'm setting up two PCs, and I've been having massive troubles getting a USB wireless dongle working. I have two Sony VAIOs (Windows XP, SP2) that I found second-hand, and since they will be in a ...
2
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1answer
872 views

Checking if my ISP supports IP multicast [closed]

I want to cast a live stream and can't tell if my ISP will support multicast or not. How do I check whether my ISP supports IP multicast?
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6answers
185 views

Software to assist with a training environment

We are currently in the process of building a training room where we will bring clients to train them in the use of our software. The basics are that an instructor will provide training on how the ...